cAMP Phosphodiesterase Inhibitors Increases Nitric Oxide Production by Modulating Dimethylarginine Dimethylaminohydrolases

Pulmonary arterial hypertension is characterized by a progressive increase in pulmonary vascular resistance caused by endothelial dysfunction, inward vascular remodeling, and severe loss of precapillary pulmonary vessel cross-sectional area. Asymmetrical dimethylarginine (ADMA), an endogenous nitric...

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Veröffentlicht in:Circulation (New York, N.Y.) N.Y.), 2011-03, Vol.123 (11), p.1194-1204
Hauptverfasser: PULLAMSETTI, Soni Savai, SAVAI, Rajkumar, SEEGER, Werner, GRIMMINGER, Friedrich, SCHERMULY, Ralph Theo, SCHAEFER, Martina Barbara, WILHELM, Jochen, GHOFRANI, Hossein Ardeschir, WEISSMANN, Norbert, SCHUDT, Christian, FLEMING, Ingrid, MAYER, Konstantin, LEIPER, James
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container_end_page 1204
container_issue 11
container_start_page 1194
container_title Circulation (New York, N.Y.)
container_volume 123
creator PULLAMSETTI, Soni Savai
SAVAI, Rajkumar
SEEGER, Werner
GRIMMINGER, Friedrich
SCHERMULY, Ralph Theo
SCHAEFER, Martina Barbara
WILHELM, Jochen
GHOFRANI, Hossein Ardeschir
WEISSMANN, Norbert
SCHUDT, Christian
FLEMING, Ingrid
MAYER, Konstantin
LEIPER, James
description Pulmonary arterial hypertension is characterized by a progressive increase in pulmonary vascular resistance caused by endothelial dysfunction, inward vascular remodeling, and severe loss of precapillary pulmonary vessel cross-sectional area. Asymmetrical dimethylarginine (ADMA), an endogenous nitric oxide synthase inhibitor, and its metabolizing enzyme dimethylarginine dimethylaminohydrolase (DDAH) play important roles in endothelial dysfunction. We investigated whether combined phosphodiesterase (PDE) 3 and 4 inhibition ameliorates endothelial function by regulating the ADMA-DDAH axis. We investigated the effects of the PDE3/4 inhibitor tolafentrine in vitro on endothelial cell survival, proliferation, and apoptosis. Effects of tolafentrine on the endothelial nitric oxide synthase/nitric oxide pathway, DDAH expression, DDAH promoter activity, and cytokine release from endothelial cells and their subsequent influence on DDAH expression were investigated. In monocrotaline-induced pulmonary arterial hypertension in rats, the effects of inhaled tolafentrine on DDAH expression and activity were investigated. Real-time-polymerase chain reaction, immunocytochemistry, and PDE activity assays suggested high expression of PDE3 and PDE4 isoforms in endothelial cells. Treatment of endothelial cells with PDE3/4 inhibitor significantly decreased ADMA-induced apoptosis via a cAMP/PKA-dependent pathway by induction of DDAH2. Chronic nebulization of PDE3/4 inhibitor significantly attenuated monocrotaline-induced hemodynamic, gas exchange abnormalities, vascular remodeling, and right heart hypertrophy. Interestingly, PDE3/4 inhibitor treatment reduced ADMA and elevated nitric oxide/cGMP levels. Mechanistically, this could be attributed to direct modulatory effects of cAMP on the promoter region of DDAH2, which was consequently found to be increased in expression and activity. Furthermore, PDE3/4 inhibitor suppressed apoptosis in endothelial cells and increased vascularization in the lung. Combined inhibition of PDE3 and 4 regresses development of pulmonary hypertension and promotes endothelial regeneration by modulating the ADMA-DDAH axis.
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Asymmetrical dimethylarginine (ADMA), an endogenous nitric oxide synthase inhibitor, and its metabolizing enzyme dimethylarginine dimethylaminohydrolase (DDAH) play important roles in endothelial dysfunction. We investigated whether combined phosphodiesterase (PDE) 3 and 4 inhibition ameliorates endothelial function by regulating the ADMA-DDAH axis. We investigated the effects of the PDE3/4 inhibitor tolafentrine in vitro on endothelial cell survival, proliferation, and apoptosis. Effects of tolafentrine on the endothelial nitric oxide synthase/nitric oxide pathway, DDAH expression, DDAH promoter activity, and cytokine release from endothelial cells and their subsequent influence on DDAH expression were investigated. In monocrotaline-induced pulmonary arterial hypertension in rats, the effects of inhaled tolafentrine on DDAH expression and activity were investigated. Real-time-polymerase chain reaction, immunocytochemistry, and PDE activity assays suggested high expression of PDE3 and PDE4 isoforms in endothelial cells. Treatment of endothelial cells with PDE3/4 inhibitor significantly decreased ADMA-induced apoptosis via a cAMP/PKA-dependent pathway by induction of DDAH2. Chronic nebulization of PDE3/4 inhibitor significantly attenuated monocrotaline-induced hemodynamic, gas exchange abnormalities, vascular remodeling, and right heart hypertrophy. Interestingly, PDE3/4 inhibitor treatment reduced ADMA and elevated nitric oxide/cGMP levels. Mechanistically, this could be attributed to direct modulatory effects of cAMP on the promoter region of DDAH2, which was consequently found to be increased in expression and activity. Furthermore, PDE3/4 inhibitor suppressed apoptosis in endothelial cells and increased vascularization in the lung. 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Real-time-polymerase chain reaction, immunocytochemistry, and PDE activity assays suggested high expression of PDE3 and PDE4 isoforms in endothelial cells. Treatment of endothelial cells with PDE3/4 inhibitor significantly decreased ADMA-induced apoptosis via a cAMP/PKA-dependent pathway by induction of DDAH2. Chronic nebulization of PDE3/4 inhibitor significantly attenuated monocrotaline-induced hemodynamic, gas exchange abnormalities, vascular remodeling, and right heart hypertrophy. Interestingly, PDE3/4 inhibitor treatment reduced ADMA and elevated nitric oxide/cGMP levels. Mechanistically, this could be attributed to direct modulatory effects of cAMP on the promoter region of DDAH2, which was consequently found to be increased in expression and activity. Furthermore, PDE3/4 inhibitor suppressed apoptosis in endothelial cells and increased vascularization in the lung. 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Vascular system</subject><subject>Cell Proliferation - drug effects</subject><subject>Cell Survival - drug effects</subject><subject>Cells, Cultured</subject><subject>Coronary heart disease</subject><subject>Cyclic GMP - biosynthesis</subject><subject>Cytokines - pharmacology</subject><subject>Diseases of the peripheral vessels. Diseases of the vena cava. Miscellaneous</subject><subject>Endothelial Cells - drug effects</subject><subject>Endothelial Cells - enzymology</subject><subject>Endothelial Cells - physiology</subject><subject>Heart</subject><subject>Hemodynamics - drug effects</subject><subject>Humans</subject><subject>Hypertension, Pulmonary - drug therapy</subject><subject>Medical sciences</subject><subject>Naphthyridines - pharmacology</subject><subject>Nitric Oxide - biosynthesis</subject><subject>Phosphodiesterase Inhibitors</subject><subject>Promoter Regions, Genetic</subject><subject>Pulmonary Gas Exchange - drug effects</subject><issn>0009-7322</issn><issn>1524-4539</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFUMlOwzAUtBCIlsIvoHDgmOIti49RWRqpm1B7jmzHaYyyVHYqEb4eRy309OaNZkajAeAJwSlCIXqR2shjxTvdNrzkjoNTRhGN6RUYowBTnwaEXYMxhJD5EcF4BO6s_XJvSKLgFowwIjGOGR6DH5ksN96mbO2hbHOtbKcMt8pLm1IL3bXGOiiNcpz1VrozWnrrb50rb2Pa_CiHDp7ovaV7hkbN3nvVterKvuJmrxvdqAtR66Yt-9y01RB3D24KXln1cL4TsHt_287m_mL9kc6ShS9pSDo_JIyEOMqpFEwyHjCRY6JiKIsIhYQiVbCICSp4BAXDjMQokDmRUeCwFGFIJoCdcqVprTWqyA5G19z0GYLZsGc2Sz9nu0WyTderZJ44DmanPZ338eQ9HEWt8n_n34BO8HwWcCt5VRjeSG0vOgoxiiAjv4n7hI8</recordid><startdate>20110322</startdate><enddate>20110322</enddate><creator>PULLAMSETTI, Soni Savai</creator><creator>SAVAI, Rajkumar</creator><creator>SEEGER, Werner</creator><creator>GRIMMINGER, Friedrich</creator><creator>SCHERMULY, Ralph Theo</creator><creator>SCHAEFER, Martina Barbara</creator><creator>WILHELM, Jochen</creator><creator>GHOFRANI, Hossein Ardeschir</creator><creator>WEISSMANN, Norbert</creator><creator>SCHUDT, Christian</creator><creator>FLEMING, Ingrid</creator><creator>MAYER, Konstantin</creator><creator>LEIPER, James</creator><general>Lippincott Williams &amp; Wilkins</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20110322</creationdate><title>cAMP Phosphodiesterase Inhibitors Increases Nitric Oxide Production by Modulating Dimethylarginine Dimethylaminohydrolases</title><author>PULLAMSETTI, Soni Savai ; SAVAI, Rajkumar ; SEEGER, Werner ; GRIMMINGER, Friedrich ; SCHERMULY, Ralph Theo ; SCHAEFER, Martina Barbara ; WILHELM, Jochen ; GHOFRANI, Hossein Ardeschir ; WEISSMANN, Norbert ; SCHUDT, Christian ; FLEMING, Ingrid ; MAYER, Konstantin ; LEIPER, James</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c463t-6393627d4cb9c9a59bd23e80cf716341ef979b4ba70b9293815cd3c75293cb663</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>3',5'-Cyclic-AMP Phosphodiesterases - antagonists &amp; inhibitors</topic><topic>3',5'-Cyclic-AMP Phosphodiesterases - metabolism</topic><topic>Amidohydrolases - antagonists &amp; inhibitors</topic><topic>Amidohydrolases - genetics</topic><topic>Apoptosis - drug effects</topic><topic>Arginine - analogs &amp; derivatives</topic><topic>Arginine - antagonists &amp; inhibitors</topic><topic>Arginine - metabolism</topic><topic>Biological and medical sciences</topic><topic>Blood and lymphatic vessels</topic><topic>Cardiology. 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Real-time-polymerase chain reaction, immunocytochemistry, and PDE activity assays suggested high expression of PDE3 and PDE4 isoforms in endothelial cells. Treatment of endothelial cells with PDE3/4 inhibitor significantly decreased ADMA-induced apoptosis via a cAMP/PKA-dependent pathway by induction of DDAH2. Chronic nebulization of PDE3/4 inhibitor significantly attenuated monocrotaline-induced hemodynamic, gas exchange abnormalities, vascular remodeling, and right heart hypertrophy. Interestingly, PDE3/4 inhibitor treatment reduced ADMA and elevated nitric oxide/cGMP levels. Mechanistically, this could be attributed to direct modulatory effects of cAMP on the promoter region of DDAH2, which was consequently found to be increased in expression and activity. Furthermore, PDE3/4 inhibitor suppressed apoptosis in endothelial cells and increased vascularization in the lung. Combined inhibition of PDE3 and 4 regresses development of pulmonary hypertension and promotes endothelial regeneration by modulating the ADMA-DDAH axis.</abstract><cop>Hagerstown, MD</cop><pub>Lippincott Williams &amp; Wilkins</pub><pmid>21382892</pmid><doi>10.1161/circulationaha.110.941484</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects 3',5'-Cyclic-AMP Phosphodiesterases - antagonists & inhibitors
3',5'-Cyclic-AMP Phosphodiesterases - metabolism
Amidohydrolases - antagonists & inhibitors
Amidohydrolases - genetics
Apoptosis - drug effects
Arginine - analogs & derivatives
Arginine - antagonists & inhibitors
Arginine - metabolism
Biological and medical sciences
Blood and lymphatic vessels
Cardiology. Vascular system
Cell Proliferation - drug effects
Cell Survival - drug effects
Cells, Cultured
Coronary heart disease
Cyclic GMP - biosynthesis
Cytokines - pharmacology
Diseases of the peripheral vessels. Diseases of the vena cava. Miscellaneous
Endothelial Cells - drug effects
Endothelial Cells - enzymology
Endothelial Cells - physiology
Heart
Hemodynamics - drug effects
Humans
Hypertension, Pulmonary - drug therapy
Medical sciences
Naphthyridines - pharmacology
Nitric Oxide - biosynthesis
Phosphodiesterase Inhibitors
Promoter Regions, Genetic
Pulmonary Gas Exchange - drug effects
title cAMP Phosphodiesterase Inhibitors Increases Nitric Oxide Production by Modulating Dimethylarginine Dimethylaminohydrolases
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